<p>将非负整数 <code>num</code> 转换为其对应的英文表示。</p>

<p>&nbsp;</p>

<p><strong>示例 1：</strong></p>

<pre>
<strong>输入：</strong>num = 123
<strong>输出：</strong>"One Hundred Twenty Three"
</pre>

<p><strong>示例 2：</strong></p>

<pre>
<strong>输入：</strong>num = 12345
<strong>输出：</strong>"Twelve Thousand Three Hundred Forty Five"
</pre>

<p><strong>示例 3：</strong></p>

<pre>
<strong>输入：</strong>num = 1234567
<strong>输出：</strong>"One Million Two Hundred Thirty Four Thousand Five Hundred Sixty Seven"
</pre>

<p>&nbsp;</p>

<p><strong>提示：</strong></p>

<ul>
	<li><code>0 &lt;= num &lt;= 2<sup>31</sup> - 1</code></li>
</ul>
